An automated rapid sediment analyser (ARSA)



The automated rapid sediment analyser (ARSA) is a pressure-transducer grain-size analysis system. This basic Woods Hole-type fall tube was automated by the addition of a digital voltmeter, Hewlett-Packard 9810A calculator, and an x-y plotter. Eight min after sample introduction, the system automatically produces size distribution data in 0·25-φ intervals, distribution statistics, and a plotted frequency histogram.